Significant Figures
State the number of Significant Figures in 280400.
4
Write the in the correct Scientific Notation:
0.2
2.0 x 10-1
Find the pressure from a force of 100N on an area of 0.25m2?
400 Pa
An apple is subject to two vertical forces: one of 40 N pulling upward, and the other of 10 N pulling downward.
What is the net force acting on the apple?
30 N upward
State the number of Significant Figures in 0.003068
4
Write the in the correct Scientific Notation:
422,000
4.22 x 105
Find the pressure produced by 1 kilogram of lead on a horizontal surface if the area it rests on is 0.02m2?
0.2 Pa
A block is pulled by two forces of 15 N and 25 N to the left, and by three forces of 10 N, 20 N, 30 N to the right.
Find the magnitude and direction of the resultant force.
20 N to the right.
Round the number 172 to two significant figures.
170
Write the in the correct Scientific Notation:
13.46 x 101
1.346 x 102
If a pressure gauge measures an increase in 3 × 104Pa on an area of 0.07 m2 what is the increase in the force applied to the area?
2,100 N
Sarah pulls on one end of a rope with a force of 100 N, and her friend Jane pulls on the other end with a force of 100 N. What happens to the rope and why?
It doesn't move at all because the resultant force is zero.
Solve and write in the appropriate amount of Significant Figures:
19.6 * 8.773
= 172
Write the in the correct Scientific Notation:
0.0000205
2.05 x 10-5
If the density of sea water is ρ = 1, 030 kg m−3, what is the pressure at 10 m below sea level? (Using Gravity =9.8m/s2)
100,940 Pa
John and Rob are engaged in a tug of war. John is pulling with a force of 230 N, and Rob is pulling with a force of 215 N.
Determine the magnitude and direction of the resultant force.
15 N towards John
Solve and write in the appropriate amount of Significant Figures:
22.5285 + 22.14 - 4.266
40.46
Express to 2 Significant Figures in Scientific Notation:
123,876.3
1.2 x 105
If in a hydraulic lift, one of the areas is three times larger than the other and a force of 15 N is applied to the smaller area, what force will be measured at the larger area?
45N
A student measures the mass of their school bag as 2.3kg. Taking gravity to be 10 N/kg on Earth and 1/6N/kg on the Moon.
Calculate the weight of the bag on Earth.
Calculate the weight on the moon.23N on Earth
23/6 or 3.83 N on the Moon